Captain Rainbow(キャプテン レインボー,Kyaputen Reinbō?) is a video game developed by Skip Ltd. and published by Nintendo for the Wii. The game was released exclusively in Japan on August 28, 2008. It was rumored to get a translated European release, but this appears to have been cancelled for unknown reasons.

The game puts players in the role of Nick, an ordinary guy whose alter ego "Captain Rainbow", was once a popular TV superhero. In order to regain his popularity, Nick travels to Mimin Island, a place where dreams are said to come true. Captain Rainbow is an action-adventure game that involves making friends with the other island residents (who are all past Nintendo characters), collecting "Kirarin" crystals, and granting their wishes.

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The game's storyline follows Nick, who is able to transform into "Captain Rainbow", a yo-yo-wielding, tokusatsu-styled superhero that stars in his own TV show. Unfortunately, his TV show is no longer popular. To restore his popularity, Nick ventures to Mimin Island, an island where wishes are said to come true. Nick meets a vast array of past, minor Nintendo characters with their own dreams and wishes on his journey.

Captain Rainbow is an action-adventure game with gameplay divided into two parts. The adventure part of the game is set on enjoying the life on the island together with its other residents. Nick can go fishing, bug catching, and help the other islanders with their requests. Most of the requests can lead to various minigames, such as boxing, volleyball, fishing and golf. Helping islanders will grant the player special, star-shaped crystals known as "Kirarin" (”Sparklies”). The action part of Captain Rainbow is based around those crystals. Each time 20 Kirarin are collected, a star will fall from the sky. The star can be carried to an altar at the top of the island where it will grant a wish. While carrying the star to the altar Nick is challenged by a mysterious Shadow who for unknown reasons wants the star for himself. If Nick succeeds in bringing the star to the altar there will be two choices left for him. He can either grant his own wish to become a popular hero again or grant the wish of one of the islanders and go back to finding other Kirarin.

Nick – Coming from "The Land of the Free": Mameruca (a pun on America), Nick's alter-ego is Captain Rainbow. Although not as popular as he used to be, Nick came to Mimin Island with the dream of restoring his popularity.

Mimin – Little bunny-like creatures with yellow ears. The original inhabitants of Mimin Island. They seem to have a connection with the Island's ability to grant wishes. They can be seen forming a bridge so that Nick can reach the shrine at the top of the island.

Shadow – After Nick obtains a star, this figure appears to steal the star away from him. Nick can try to knock him out with his Yo-Yo while in his Captain Rainbow form, but can also try to defeat him in a duel when the Shadow hits him in the back. A group of four Shadows can be seen dancing around a stolen star, slowly dancing its life-force away.

Birdo (Catherine) – From Yume Kojo: Doki Doki Panic/Super Mario Bros. 2, Birdo's reason to come to Mimin Island is to become popular with all the boys, but is arrested by Mappo after walking in the women's restroom, uncertain of Birdo's gender. Birdo claims that Nick is her boyfriend after Nick proves she is female and releases her from prison. Birdo lives in the "Cute House" on a separated part of the Island. The interior consists of mostly pink colored furniture, ribbons, and eggs. The game continues the recurring controversy around Birdo's gender, where she claims to be female and that Nick is her boyfriend but she has a male voice.

Mappo – The robot jailer from Giftpia, it came to Mimin Island to become a plainclothes officer instead of a Koban officer. Mappo lives together with Tao in a strange guardstation with monitors resembling Mappo and a doghouse for Tao. It holds no furniture as neither of them have need for it. Birdo's cell is located here.

Drake Redcrest (Gitchoman) – The action figure from Chibi-Robo!. He can be found on the beach, near the Famicom Wars Soldier's volleyball net.

Little Mac – From the NES Punch-Out!! games. Mac's wish is to become a world champion once again. It is shown that, depending on how Nick helps Mac with his training, he can become either massive or incredibly thin. He lives in his boxing ring near Birdo's house.

Hikari – From Shin Onigashima. She is shown to be intimate with Nick, as they can be seen sitting together at the beach at night. She lives in a house shaped like a Japanese shrine. Next to her house is a pond with a waterfall. She's much older here than in her original game.

Takamaru – From Nazo no Murasame Jō. His wish has something to do with the fact that he can't control his excitement when thinking of women, which leads to extreme nosebleeds. He lives in a Dojo so run down, that pieces of wall and roof are missing.

Ossan – From Famicom Golf, he is portrayed as an old man. His house is fairly normal, besides the fact that it has a giant golf tee with a giant golfball next to it.

Lip – From Panel de Pon (which was remade into Tetris Attack for US and PAL regions). Her dream is to become a great magician. She lives in a Mushroom shaped house which has a Piranha Plant from Super Mario Bros. in its garden. Her choice of interior consists of flower shaped furniture with eyes and crayon drawings of herself on rainbows.

Tracy – From The Legend of Zelda: Link's Awakening. Above her throne she has a portrait of Mario and Link next to an empty portrait that later in the game has a portrait of Takamaru. Her wish is to enslave all the men in the world. She lives in a Grand Mansion in the center of the Island where she usually sits on her throne with a swarm of flies swirling and buzzing around her (a small indication that she may be the flies queen). At night, she can be found in front of her mirror, powdering her face with flies or using the toilet behind a revealing showercurtain.

Famicom Wars Soldiers – From Famicom Wars. For some reason, their wish is to become good at volleyball. They train their volleyball skills during the day, search for shellfish when the tide is low and sit around the campfire at night. They live in a camp near the beach with a watchtower. Army binoculars can be seen together with a picture of Tracy with flies buzzing around it in the watchtower.

Devil – From Devil World. His wish is to become the number one villain in the underworld. He lives in a house shaped like a skull with bat wings on a far side of the island where hardly any plants grow. His house is decorated with mostly skull themed furniture.

The four reviewers of Weekly Famitsu magazine scored Captain★Rainbow a total of 31 out of 40. The panel was overall impressed by the game's writing and characters, especially due to the day and night cycles. They also enjoyed the gameplay, music, and tempo, but found the humor to be often vulgar.[2]

Captain★Rainbow was a financial disappointment. According to Media Create, the game only sold a scant 6,361 copies during its first week of release.[3] A total of 22,682 copies were sold in Japan in 2008.[4]